correct mistranslation of "not sign" for Italian

[quazar-omega]

I just stumbled upon this when I was looking for the "not" symbol (¬). I was really confused at first, took me a minute, but then I understood and found it pretty funny ( ˃ᗜ˂ ) (it came out as meaning "don't sign").

Anyway, here's the correction, I'm wondering if there could be other silly mistakes hiding around, since this looks like a typical machine translation thing, but I haven't dug deep in the code base so I apologize if the extent of my contribution is this small